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作者在实验室内比较了3种杀螺剂杀灭肝片形吸虫中间宿虫椎实螺的效果,观察了温度、日光和采螺时期对药物效果的影响。越冬前采集的幼螺(壳长2～5毫米),于水温22～25℃时,在不同浓度的药液中浸泡48小时的杀螺效果以五氯酚钠(含有效成分86%)最好,LC_(50)为1.13ppm;其次是三萜系皂素(triterpenoid saponin),LC_(50)为2.87ppm;Yurimin P-99更差,LC_(50)为6.5ppm。3种药物的杀螺效果,均随温度的升高而显著增高。五氯酚钠33℃药液浸泡24
The authors compared the effects of three kinds of molluscicides on the killing of the solid fusiformis of the middle flies in the laboratory and the effects of temperature, sunlight and colliery on the drug effects. Juvenile snails (shell length 2 ~ 5 mm) collected before the winter, at the water temperature of 22 ~ 25 ℃, soaking 48 hours in different concentrations of liquid to kill the effect of sodium pentachlorophenate (containing 86% of the active ingredient) Good, LC_ (50) was 1.13ppm; followed by triterpenoid saponin, LC_ (50) was 2.87ppm; Yurimin P-99 was worse, LC_ (50) was 6.5ppm. The killing effect of three kinds of drugs, both with the temperature increased significantly higher. Sodium pentachlorophenol 33 ℃ liquid soak 24